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Lu, Huayi e6fa411af0 DWS DEV 830.201 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2024-05-16 07:24:04 +00:00

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<a name="EN-US_TOPIC_0000001495093645"></a><a name="EN-US_TOPIC_0000001495093645"></a>
<h1 class="topictitle1">Functions for Deleting Residual Files</h1>
<div id="body0000001495093645"><div class="section" id="EN-US_TOPIC_0000001495093645__section16677221145"><h4 class="sectiontitle">pg_rm_residualfiles(filepath)</h4><p id="EN-US_TOPIC_0000001495093645__p65832219149">Description: Deletes files from a specified residual file list on the current instance. This function is an instance-level function and is irrelevant to the current database. It can run on any instance.</p>
<p id="EN-US_TOPIC_0000001495093645__p1358102261411">Parameter type: text</p>
<p id="EN-US_TOPIC_0000001495093645__p1959322161417">Return type: record</p>
<p id="EN-US_TOPIC_0000001495093645__p0591522191418">The following table describes return columns.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001495093645__table360102217143" frame="border" border="1" rules="all"><caption><b>Table 1 </b>pg_rm_residualfiles (filepath) return fields</caption><thead align="left"><tr id="EN-US_TOPIC_0000001495093645__row145913225146"><th align="left" class="cellrowborder" valign="top" width="19.07%" id="mcps1.3.1.6.2.4.1.1"><p id="EN-US_TOPIC_0000001495093645__p13591022131411">Column</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21.02%" id="mcps1.3.1.6.2.4.1.2"><p id="EN-US_TOPIC_0000001495093645__p559172241416">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="59.91%" id="mcps1.3.1.6.2.4.1.3"><p id="EN-US_TOPIC_0000001495093645__p1459182211147">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001495093645__row126082216149"><td class="cellrowborder" valign="top" width="19.07%" headers="mcps1.3.1.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p359202215147">result</p>
</td>
<td class="cellrowborder" valign="top" width="21.02%" headers="mcps1.3.1.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p10592223142">bool</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.1.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p659622101415">Deletion completed or not</p>
</td>
</tr>
</tbody>
</table>
</div>
<p id="EN-US_TOPIC_0000001495093645__p1160102213146">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495093645__screen76014229144"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pg_rm_residualfiles</span><span class="p">(</span><span class="s1">'pgrf_20200908160211441599'</span><span class="p">);</span>
<span class="w"> </span><span class="k">result</span><span class="w"> </span>
<span class="c1">--------</span>
<span class="w"> </span><span class="n">t</span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
<div class="note" id="EN-US_TOPIC_0000001495093645__note14601122111411"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0000001495093645__ul8662113374914"><li id="EN-US_TOPIC_0000001495093645__li96623336492">Residual files can be deleted only after verification using the pg_verify_residualfiles() function.</li><li id="EN-US_TOPIC_0000001495093645__li26621233194916">All verified files, regardless which database they are in, will be deleted.</li><li id="EN-US_TOPIC_0000001495093645__li96624333499">If all files recorded in the specified file have been deleted, the specified file will be removed and backed up in the <strong id="EN-US_TOPIC_0000001495093645__b15216374472220">$PGDATA/pg_residualfile/backup</strong> directory.</li></ul>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495093645__section1648363151413"><h4 class="sectiontitle">pg_rm_residualfiles()</h4><p id="EN-US_TOPIC_0000001495093645__p14476103110144">Description: Deletes all files recorded on all residual file lists on the current instance. This function is an instance-level function and is irrelevant to the current database. It can run on any instance.</p>
<p id="EN-US_TOPIC_0000001495093645__p1847653171412">Parameter type: none</p>
<p id="EN-US_TOPIC_0000001495093645__p847663111142">Return type: record</p>
<p id="EN-US_TOPIC_0000001495093645__p1747693115144">The following table describes return columns.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001495093645__table1447810318143" frame="border" border="1" rules="all"><caption><b>Table 2 </b>pg_rm_residualfiles () return fields</caption><thead align="left"><tr id="EN-US_TOPIC_0000001495093645__row1247673111414"><th align="left" class="cellrowborder" valign="top" width="19.09%" id="mcps1.3.2.6.2.4.1.1"><p id="EN-US_TOPIC_0000001495093645__p8476031121412">Column</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21%" id="mcps1.3.2.6.2.4.1.2"><p id="EN-US_TOPIC_0000001495093645__p9476631161415">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="59.91%" id="mcps1.3.2.6.2.4.1.3"><p id="EN-US_TOPIC_0000001495093645__p7476163141415">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001495093645__row1647719318143"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.2.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p19477153120144">result</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p144776317145">bool</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.2.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p847783161415">Deletion completed or not</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001495093645__row347712319149"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.2.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p3477103118141">filepath</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p1647715317149">text</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.2.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p6477203151413">Residual file path</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001495093645__row9478531131419"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.2.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p11477131111419">notes</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p8477163114144">text</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.2.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p3477153131415">Notes</p>
</td>
</tr>
</tbody>
</table>
</div>
<p id="EN-US_TOPIC_0000001495093645__p1247833111149">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495093645__screen2478153181413"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pg_rm_residualfiles</span><span class="p">();</span>
<span class="w"> </span><span class="k">result</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">filepath</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">notes</span><span class="w"> </span>
<span class="c1">--------+---------------------------+-------</span>
<span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pgrf_20200908160211441546</span><span class="w"> </span><span class="o">|</span><span class="w"> </span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
<div class="note" id="EN-US_TOPIC_0000001495093645__note148053116141"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0000001495093645__ul648043161416"><li id="EN-US_TOPIC_0000001495093645__li1480431161416">Residual files can be deleted only after verification using the pg_verify_residualfiles() function.</li><li id="EN-US_TOPIC_0000001495093645__li248073161415">All verified files, regardless which database they are in, will be deleted.</li><li id="EN-US_TOPIC_0000001495093645__li5480143110143">If all files recorded in the specified file have been deleted, the specified file will be removed and backed up in the <strong id="EN-US_TOPIC_0000001495093645__b67209414694225">$PGDATA/pg_residualfile/backup</strong> directory.</li></ul>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0000001495093645__section17643104418145"><h4 class="sectiontitle">pgxc_rm_residualfiles()</h4><p id="EN-US_TOPIC_0000001495093645__p206412445140">Description: Unified CN query function of pgxc_rm_residualfiles. This function is a cluster-level function and is irrelevant to the current database. It runs on CNs.</p>
<p id="EN-US_TOPIC_0000001495093645__p1664134491419">Parameter type: none</p>
<p id="EN-US_TOPIC_0000001495093645__p66411144141413">Return type: record</p>
<p id="EN-US_TOPIC_0000001495093645__p15641444151416">The following table describes return columns.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001495093645__table206431744141413" frame="border" border="1" rules="all"><caption><b>Table 3 </b>pgxc_rm_residualfiles () return fields</caption><thead align="left"><tr id="EN-US_TOPIC_0000001495093645__row126411744141413"><th align="left" class="cellrowborder" valign="top" width="19.09%" id="mcps1.3.3.6.2.4.1.1"><p id="EN-US_TOPIC_0000001495093645__p16411744131415">Column</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21%" id="mcps1.3.3.6.2.4.1.2"><p id="EN-US_TOPIC_0000001495093645__p19641744111420">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="59.91%" id="mcps1.3.3.6.2.4.1.3"><p id="EN-US_TOPIC_0000001495093645__p19641144417140">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001495093645__row264274418140"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.3.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p126429449144">nodename</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p196421244151412">text</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.3.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p17642204431412">Node name</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001495093645__row1364294414140"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.3.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p1164254419144">result</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p12642154431410">bool</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.3.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p10642244171412">Deletion completed or not</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001495093645__row364204417149"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.3.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p116422444144">filepath</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p664212440142">text</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.3.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p5642184413143">Residual file path</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001495093645__row1264324415148"><td class="cellrowborder" valign="top" width="19.09%" headers="mcps1.3.3.6.2.4.1.1 "><p id="EN-US_TOPIC_0000001495093645__p19642174413146">notes</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.6.2.4.1.2 "><p id="EN-US_TOPIC_0000001495093645__p1364364461415">text</p>
</td>
<td class="cellrowborder" valign="top" width="59.91%" headers="mcps1.3.3.6.2.4.1.3 "><p id="EN-US_TOPIC_0000001495093645__p46431144101415">Notes</p>
</td>
</tr>
</tbody>
</table>
</div>
<p id="EN-US_TOPIC_0000001495093645__p1564334414148">Example:</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001495093645__screen1864324419149"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span>
<span class="normal">6</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pgxc_rm_residualfiles</span><span class="p">();</span>
<span class="w"> </span><span class="n">nodename</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="k">result</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">filepath</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">notes</span><span class="w"> </span>
<span class="c1">--------------+--------+---------------------------+-------</span>
<span class="w"> </span><span class="n">cn_5001</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pgrf_20200910170129360401</span><span class="w"> </span><span class="o">|</span><span class="w"> </span>
<span class="w"> </span><span class="n">dn_6001_6002</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pgrf_20200908160211441546</span><span class="w"> </span><span class="o">|</span><span class="w"> </span>
<span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_06_0060.html">Residual File Management Functions</a></div>
</div>
</div>
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